Take care , Peter . Don't run so fast.Are you tired ?   Oh , yes . May I sit on the grass ?   No , you mustn't sit on the grass.Don ' t you see the notes ?   Yes , I can see it.But what's on it ?   It says Keep off the grass !   Well , there's a bench under the tree.We can sit there .   Be careful.You can't smoke here .   Why not ?   Can't you see the notes there ? It says No smoking here . 